我打算开发一个应用程序,在 recyclerCardView
中显示一些动态数据。所以我决定在我的主要 recyclerView
中添加一个 recyclerView
称为 CheckBoxRecyclerView
。这是我的应用程序代码:
我的主要活动:
setContentView(R.layout.activity_startup);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
reminderView = (RecyclerView) findViewById(R.id.reminder_recycler_view);
RlayoutManager = new LinearLayoutManager(this);
reminderView.setLayoutManager(RlayoutManager);
setSupportActionBar(toolbar);
cardView = (CardView) findViewById(R.id.card_first);
cardView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(getApplicationContext() , ReminderActivity.class);
startActivity(intent);
}
});
ReminderHelper helper = new ReminderHelper(getApplicationContext());
ReminderAdapter reminderAdapter = new ReminderAdapter(helper);
ContentValues reminderValues = new ContentValues();
ContentValues checkboxValues = new ContentValues();
// Devlopment Part ->
reminderValues.put("reminderTitle" , "A Reminder Title");
reminderValues.put("reminderLastModDate" , 0);
reminderValues.put("reminderAlarm" , 0);
reminderValues.put("reminderPicURI" , "skjshksjh");
reminderValues.put("ReminderBackground" , "#00796b");
checkboxValues.put("checkboxText" , "This is a CheckBox");
checkboxValues.put("isDone" , false);
checkboxValues.put("checkboxReminderID" , 0);
reminderAdapter.INSERT_REMINDER(reminderValues);
reminderAdapter.INSERT_CHECKBOX(checkboxValues);
File dbPath = getApplicationContext().getDatabasePath(ReminderHelper.DATABASE_NAME);
if(dbPath.exists()){
List<Reminder> reminders = new ReminderAdapter(helper).getAllReminders();
List<CheckBoxItem> checkBoxItems = new ReminderAdapter(helper).getAllCheckBoxes();
RAdapter = new RAdapter(reminders , getApplicationContext() , checkBoxItems);
reminderView.setAdapter(RAdapter);
}else{
}
它的布局文件:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingBottom="8dp"
android:paddingLeft="8dp"
android:paddingRight="8dp"
android:paddingTop="8dp"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:context="com.smflog.sreminder.StartupActivity"
tools:showIn="@layout/app_bar_startup">
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:id="@+id/reminder_recycler_view"
android:scrollbars="vertical"
android:layout_height="match_parent">
在这个 recyclerView 里面还有另一个:
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/reminder_card"
card_view:cardCornerRadius="2dp"
card_view:cardElevation="4dp"
card_view:cardUseCompatPadding="true">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingBottom="16dp"
android:paddingLeft="8dp">
<com.smflog.sreminder.utils.TitleView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/reminder_title"
android:paddingTop="8dp"
android:text="Wellcome To Google Keep !"
android:textSize="15dp"
android:textStyle="bold" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content" android:orientation="horizontal">
<android.support.v7.widget.RecyclerView
android:layout_width="wrap_content"
android:id="@+id/checkbox_recycler_view"
android:layout_height="wrap_content">
</android.support.v7.widget.RecyclerView>
</LinearLayout>
</LinearLayout>
</android.support.v7.widget.CardView>
他们的适配器 Main ( RAdapter ) :
public class RAdapter extends RecyclerView.Adapter<RAdapter.ViewHolder> {
List<Reminder> reminder;
private Context context;
private LinearLayoutManager lln;
private CAdapter checkBoxAdapter;
private List<CheckBoxItem> checkBoxItems;
public static class ViewHolder extends RecyclerView.ViewHolder {
public CardView rCardView;
public RecyclerView recyclerView;
public TitleView rTitleView;
public ViewHolder(View itemView) {
super(itemView);
rCardView = (CardView) itemView.findViewById(R.id.reminder_card);
rTitleView = (TitleView) itemView.findViewById(R.id.reminder_title);
recyclerView = (RecyclerView) itemView.findViewById(R.id.checkbox_recycler_view);
}
}
public RAdapter(List<Reminder> reminder, Context context, List<CheckBoxItem> checkBoxItems) {
this.reminder = reminder;
this.context = context;
this.checkBoxItems = checkBoxItems;
}
@Override
public RAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.reminder_card, parent, false);
ViewHolder vh = new ViewHolder(v);
return vh;
}
@Override
public void onBindViewHolder(RAdapter.ViewHolder holder, int position) {
lln = new LinearLayoutManager(context);
holder.recyclerView.setLayoutManager(lln);
checkBoxAdapter = new CAdapter(checkBoxItems, context);
holder.recyclerView.setAdapter(checkBoxAdapter);
holder.rCardView.setCardBackgroundColor(Color.parseColor("#00796b"));
holder.rTitleView.setText(reminder.get(position).getReminderTitle());
}
@Override
public int getItemCount() {
return reminder.size();
}
}
第二个适配器:
public class CAdapter extends RecyclerView.Adapter<CAdapter.ViewHolder> {
List<CheckBoxItem> checkBoxItems;
Context context;
public static class ViewHolder extends RecyclerView.ViewHolder {
public TitleView checkBoxTitle;
public ImageView deleteCheckBox;
public CheckBox checkBoxCheckBox;
public ViewHolder(View itemView) {
super(itemView);
checkBoxTitle = (TitleView) itemView.findViewById(R.id.checkbox_item_text);
checkBoxCheckBox = (CheckBox) itemView.findViewById(R.id.checkbox_item_checkbox);
Log.d("CAdapterLog", "Adpater Holded !!!!! :( ");
deleteCheckBox = (ImageView) itemView.findViewById(R.id.btn_delete_checkbox);
}
}
public CAdapter(List<CheckBoxItem> checkBoxItems, Context context) {
this.checkBoxItems = checkBoxItems;
this.context = context;
Log.d("CAdapterLog", "Adpater Created !!!!! :( ");
}
@Override
public CAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.checkbox_item, parent, false);
ViewHolder vh = new ViewHolder(v);
Log.d("CAdapterLog", "Adpater ViewHolded :( !!!!! :( ");
return vh;
}
@Override
public void onBindViewHolder(CAdapter.ViewHolder holder, int position) {
Boolean isCheckboxChecked = Boolean.parseBoolean(checkBoxItems.get(position).getCheckBoxIsDone());
String checkBoxText = checkBoxItems.get(position).getCheckBoxBody();
Log.d("CAdapterLog", "Adpater Binded :( ");
final int checkboxID = Integer.parseInt(checkBoxItems.get(position).getCheckBoxID());
int reminderCheckBoxID = Integer.parseInt(checkBoxItems.get(position).getCheckBoxReminderID());
holder.deleteCheckBox.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.d("CAdapterLog", "Cross Button Clicked !");
}
});
holder.checkBoxCheckBox.setChecked(isCheckboxChecked);
holder.checkBoxTitle.setText(checkBoxText);
}
@Override
public int getItemCount() {
return checkBoxItems.size();
}
}
还有我的问题: 正如您在 CAdapter 中看到的,仅显示构造函数的 日志 消息。
更新:如果有另一种方法可以在另一个动态卡中显示一些动态数据,如果是,使用它而不是 recyclerView 更好吗?
有人帮我吗?
输出:您看到的 应用程序输出 只是 RAdapter 的 setTitle 有效。
原文由 Mohammad Fatemi 发布,翻译遵循 CC BY-SA 4.0 许可协议
我想建议使用单个
RecyclerView
并动态填充您的列表项。我添加了一个 github 项目 来描述如何做到这一点。你可能会看看。虽然其他解决方案可以正常工作,但我想建议,这是在RecyclerView
中显示多个列表的更快、更有效的方法。这个想法是在您的
onCreateViewHolder
和onBindViewHolder
方法中添加逻辑,以便您可以为RecyclerView
中的确切位置添加正确的视图。我也添加了一个 示例项目 以及该 wiki。您可以克隆并检查它的作用。为方便起见,我发布了我使用过的适配器。
还有另一种方法可以将您的项目保存在单个
ArrayList
对象中,以便您可以设置一个属性标记项目以指示哪个项目来自第一个列表,哪个项目属于第二个列表。然后将ArrayList
传递到您的RecyclerView
中,然后在适配器内部实现逻辑以动态填充它们。希望有帮助。